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Chiral silylation reagents for the determination of absolute configuration by NMR spectroscopy.
These reagents are prepared in high chemical yield in one step and can be used to derivatize chiral allylic alcohols which are incompatible with ester-based methodologies, and are readily distinguished by their (1)H NMR spectra. Expand
Iridoid biosynthesis in staphylinid rove beetles (Coleoptera: Staphylinidae, Philonthinae).
- D. Weibel, N. Oldham, B. Feld, G. Glombitza, K. Dettner, W. Boland
- Biology, Medicine
- Insect biochemistry and molecular biology
- 27 April 2001
A detailed account of iridoid biosynthesis in rove beetles is constructed, which resembles the biosynthetic route in leaf beetle larvae, but exhibits distinct stereochemical differences. Expand
Cycloalkene budding: mass spectrometric studies of competitive and dual cycloalkene extrusion reactions from doubly unsaturated aldehyde N,N-dimethylhydrazones.
- D. Weibel, A. Attygalle, L. Shevy, J. Meinwald
- Chemistry, Medicine
- Rapid communications in mass spectrometry : RCM
- 15 July 2000
Mass spectral fragmentation pathways of four doubly unsaturated aldehyde N,N-dimethylhydrazones were investigated using EI-MS and tandem mass spectrometry (MS/MS) and a rapid cascade of cycloalkene budding accounts best for the experimental observations. Expand